“…Subsequently, the short coil design of Li et al was chosen, presumably because of the better coupling coefficient and the better suitability for a toroidal arrangement of multiple modules. Later publications from the Southwest Jiaotong University deal with simulations of the mutual inductance between several modules (toroidal arrangement) [26]- [28] or the asynchronous ignition of several modules (pulse shaping) [28]. The latter issue was experimentally tested with 2 HTSPPT modules which have been slightly modified since 2012 (smaller inductances but better coupling) [29].…”